On Tue, 3 Feb 2004, Petri Helenius wrote:
Stephen J. Wilcox wrote:
Why large MTU then? Most modern ethernet controllers don´t care if you´re sending 1500 or 9000 byte packets. (with proper drivers taking advantage of the features there) If you´re paying for 40 byte packets anyway, there is no incentive to ever go beyond 1500 byte MTU.
I think its partially due to removal of overhead and improvements you get out of TCP (bearing in mind it uses windowing and slow start)
Sure, if you control both endpoints. If you don´t and receivers have small (4k,8k or 16k) window sizes, your performance will suffer.
Maybe we should define if we´re talking about record breaking attempts or real operationally useful things here.
By definition of this discussion about using large MTU we are assuming that packets are arriving >1500 bytes and therefore that we do have control of the endpoints and they are set to use jumbos Steve